package top.ysh.consul.controller;


import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import top.ysh.consul.domain.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * 服务的调用方
 */

@RestController
@RequestMapping("/order")
public class OrderController {

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private DiscoveryClient discoveryClient;


    @GetMapping("/goods/{id}")
    public Goods findGoodsById(@PathVariable("id") int id) {

        // String url = "http://localhost:8000/goods/findOne/" + id;
        // 3. 调用方法
        // Goods goods = restTemplate.getForObject(url, Goods.class);


        // 演示discoveryClient使用
        List<ServiceInstance> instances = discoveryClient.getInstances("consul-provider");
        // 集合是否有数据
        if (instances == null || instances.size() == 0){
            return null;
        }
        ServiceInstance instance = instances.get(0);// 获取第一个元素
        // ip
        String host = instance.getHost();
        // 端口
        int port = instance.getPort();

        System.out.println("host = " + host);
        System.out.println("port = " + port);

        // 调用远程服务的url,动态获取
        String url = "http://"+host+":"+port+"/goods/findOne/" + id;

        // 3. 调用方法
        Goods goods = restTemplate.getForObject(url, Goods.class);


        return goods;
    }
}
